Fibre optic cabling is preferred for backbone cabling, particularly over large distances. But whichever type of cabling you use, cable that passes from floor-to-floor or through plenum areas must be fire-rated. Optical fibre non-conductive riser (OFNR) and/or optical fibre non-conductive plenum (OFNP) are the obvious choices here.
Backbone cabling
Cat 6 UTP
Cat 6 UTP
Cat 6 UTP
62.5/125 Fiber
its a backbone cable
Serial
Makes you sit up straight.
Body
its not
The UTP (Unshielded twisted pair) cable is preferred; it's far less expensive to install in large amounts.
Parallel Backbone